Development of an infrared spectro-microtomography using a Mid-IR supercontinuum laser

2022 Fiscal Year Annual Research Report

• Project/Area Number: 19H01954
• Research Institution: Hiroshima University
• Principal Investigator: 薮田 ひかる 広島大学, 先進理工系科学研究科(理), 教授 (30530844)
• Co-Investigator(Kenkyū-buntansha): 池本 夕佳 公益財団法人高輝度光科学研究センター, 分光推進室, 主幹研究員 (70344398)
• Project Period (FY): 2019-04-01 – 2024-03-31
• Keywords: レーザー赤外分光マイクロトモグラフィー / 地球外有機物

Outline of Annual Research Achievements

当該年度は、小惑星探査計画「はやぶさ2」で帰還した小惑星リュウグウサンプルの初期分析における固体有機物分析チームリーダーとしての任務に専心した。チームの成果は以下のとおりである。

小惑星リュウグウ試料をさまざまな顕微分光法で非破壊分析した結果、試料中の有機物を構成する官能基組成は芳香族炭素、脂肪族炭素、ケトン、カルボキシルを含み、最も始源的な炭素質コンドライト隕石のものに類似した。また、ナノグロビュール状有機物や薄く広がった不定形の有機物が層状ケイ酸塩や炭酸塩に混じり合った状態が見出され、これらの有機物がリュウグウ母天体で液体の水と反応して生じた証拠を見出した。リュウグウ試料の有機物にはグラファイト様構造は見られなかったことから、これらの有機物は母天体内部や天体衝突によって高温で加熱されなかったことを示した。
また、リュウグウ試料から重水素および/または窒素15が濃集している領域が検出されたことから、分析したリュウグウの有機物はたしかに地球外起源であることが示されたと共に、これらの少なくとも一部の有機物は星間分子雲や原始惑星系円盤外側などの極低温環境で形成されたことが明らかとなった。

上述の活動により、地球外有機物の3次元分布観察を実現させるために中赤外スーパーコンティニュームレーザーを光源とした赤外分光マイクロトモグラフィー（MIRS-laser-CT）の開発に取り組む当該研究を十分に進めることができなかったが、現時点では、厚さ一定の試料であればその２次元分布を赤外レーザーを用いて取得することができる段階に到達している。

Current Status of Research Progress

4: Progress in research has been delayed.

Reason

当該年度は、研究代表者がはやぶさ２初期分析固体有機物分析チームリーダーとしての任務に専心する必要があったため、個人の研究としての本研究課題の進捗は遅れている。

Strategy for Future Research Activity

回転装置への試料固定法および試料状態を決定する。

Research Products

• [Int'l Joint Research] パリ自然史博物館/グルノーブル大学/パリ＝サクレー大学(フランス)
  • Country Name: FRANCE
  • Counterpart Institution: パリ自然史博物館/グルノーブル大学/パリ＝サクレー大学
• [Int'l Joint Research] カーネギー研究所/バークレー国立研究所/アメリカ海軍調査研究所(米国)
  • Country Name: U.S.A.
  • Counterpart Institution: カーネギー研究所/バークレー国立研究所/アメリカ海軍調査研究所
• [Journal Article] Hydrogen Isotopic Composition of Hydrous Minerals in Asteroid Ryugu (2023)
  • Author(s): Piani L., Nagashima K., Kawasaki N., Sakamoto N., Bajo K.-I., Yabuta H. et al.
  • Journal Title: The Astrophysical Journal Letters Volume: 946 Pages: L43～L43
  • DOI: 10.3847/2041-8213/acc393
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Uracil in the carbonaceous asteroid (162173) Ryugu (2023)
  • Author(s): Oba Y., Koga T., Takano Y., Ogawa N. O., Ohkouchi N., Sasaki K., Sato H., Glavin D. P., Dworkin J. P., Naraoka H., Tachibana S., Yurimoto H., Nakamura T., Noguchi T., Okazaki R., Yabuta H. et al.
  • Journal Title: Nature Communications Volume: 14 Pages: -
  • DOI: 10.1038/s41467-023-36904-3
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Interaction between clay minerals and organics in asteroid Ryugu (2023)
  • Author(s): Viennet J.-C., Roskosz M., Nakamura T., Beck P., Baptiste B., Lavina B., Alp E. E., Hu M. Y., Zhao J., Gounelle M., Brunetto R., Yurimoto H., Noguchi T., Okazaki R., Yabuta H. et al.
  • Journal Title: Geochemical Perspectives Letters Volume: 25 Pages: 8～12
  • DOI: 10.7185/geochemlet.2307
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Chemical composition of carbonaceous asteroid Ryugu from synchrotron spectroscopy in the mid- to far-infrared of Hayabusa2-returned samples (2023)
  • Author(s): Dartois E., Kebukawa Y., Yabuta H., Mathurin J., Engrand C., Duprat J., Bejach L., Dazzi A., Deniset-Besseau A. et al.
  • Journal Title: Astronomy & Astrophysics Volume: 671 Pages: A2～A2
  • DOI: 10.1051/0004-6361/202244702
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] PAHs, hydrocarbons, and dimethylsulfides in Asteroid Ryugu samples A0106 and C0107 and the Orgueil (CI1) meteorite (2023)
  • Author(s): Aponte J. C., Dworkin J. P., Glavin D. P., Elsila J. E., Parker E. T., McLain H. L., Naraoka H., Okazaki R., Takano Y., Tachibana S., Dong G., Zeichner S. S., Eiler J.M., Yurimoto H., Nakamura T., Yabuta H. et al.
  • Journal Title: Earth, Planets and Space Volume: 75 Pages: -
  • DOI: 10.1186/s40623-022-01758-4
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Extraterrestrial amino acids and amines identified in asteroid Ryugu samples returned by the Hayabusa2 mission (2023)
  • Author(s): Parker E. T., McLain H. L., Glavin D. P., Dworkin J. P., Elsila J. E., Aponte J.C., Naraoka H., Takano Y., Tachibana S., Yabuta H. et al.
  • Journal Title: Geochimica et Cosmochimica Acta Volume: 347 Pages: 42～57
  • DOI: 10.1016/j.gca.2023.02.017
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Macromolecular organic matter in samples of the asteroid (162173) Ryugu (2023)
  • Author(s): Yabuta H et al.
  • Journal Title: Science Volume: 379 Pages: -
  • DOI: 10.1126/science.abn9057
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Soluble organic molecules in samples of the carbonaceous asteroid (162173) Ryugu (2023)
  • Author(s): Naraoka H., Takano Y., Dworkin J. P., Oba Y., Hamase K., Furusho A., Ogawa N. O., Hashiguchi M., Fukushima K., Aoki D., Schmitt-Kopplin P., Aponte J. C., Yurimoto H., Nakamura T., Noguchi T., Okazaki R., Yabuta H. et al.
  • Journal Title: Science Volume: 379 Pages: -
  • DOI: 10.1126/science.abn9033
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Chondrule-like objects and Ca-Al-rich inclusions in Ryugu may potentially be the oldest Solar System materials (2023)
  • Author(s): Nakashima D., Nakamura T., Zhang M., Kita N. T., Mikouchi T., Yoshida H., Enokido Y., Morita T., Kikuiri M., Amano K., Kagawa E., Yada T., Nishimura M., Nakato A., Miyazaki A., Yogata K., Abe M., Okada T., Usui T., Yoshikawa M., Saiki T., Tanaka S., Nakazawa S., Terui F., Yurimoto H., Noguchi T., Yabuta H. et al.
  • Journal Title: Nature Communications Volume: 14 Pages: -
  • DOI: 10.1038/s41467-023-36268-8
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Nonequilibrium spherulitic magnetite in the Ryugu samples (2023)
  • Author(s): Dobrica E., Ishii H. A., Bradley J. P., Ohtaki K., Brearley A. J., Noguchi T., Yabuta H. et al.
  • Journal Title: Geochimica et Cosmochimica Acta Volume: 346 Pages: 65～75
  • DOI: 10.1016/j.gca.2023.02.003
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Measurement of Microscopic Thermal Diffusivity Distribution for Ryugu Sample by Infrared Lock-in Periodic Heating Method (2023)
  • Author(s): Ishizaki T., Nagano H., Tanaka S., Sakatani N., Nakamura T., Okada T., Fujita R., Alasli A., Morita T., Kikuiri M., Amano K., Kagawa E., Yurimoto H., Noguchi T., Okazaki R., Yabuta H. et al.
  • Journal Title: International Journal of Thermophysics Volume: 44 Pages: -
  • DOI: 10.1007/s10765-023-03158-6
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The noble gas and nitrogen relationship between Ryugu and carbonaceous chondrites (2023)
  • Author(s): Broadley M. W., Byrne D. J., Furi E., Zimmermann L., Marty B., Okazaki R., Yada T., Kitajima F., Tachibana S., Yogata K., Sakamoto K., Yurimoto H., Nakamura T., Noguchi T., Naraoka H., Yabuta H. et al.
  • Journal Title: Geochimica et Cosmochimica Acta Volume: 345 Pages: 62～74
  • DOI: 10.1016/j.gca.2023.01.020
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Small grains from Ryugu: handling and analysis pipeline for infrared synchrotron microspectroscopy (2023)
  • Author(s): Rubino S., Dionnet Z., Aleon-Toppani A., Brunetto R., Nakamura T., Baklouti D., Djouadi Z., Lantz C., Mivumbi O., Borondics F., Lefrancois S., Sandt C., Capitani F., Heripre; E., Troadec D., Matsumoto M., Amano K., Morita T., Yurimoto H., Noguchi T., Okazaki R., Yabuta H. et al.
  • Journal Title: Earth, Planets and Space Volume: 75 Pages: -
  • DOI: 10.1186/s40623-022-01762-8
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Noble gases and nitrogen in samples of asteroid Ryugu record its volatile sources and recent surface evolution (2023)
  • Author(s): Okazaki R., Marty B., Busemann H., Hashizume K., Gilmour J. D., Meshik A., Yabuta H. et al.
  • Journal Title: Science Volume: 379 Pages: -
  • DOI: 10.1126/science.abo0431
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Formation and evolution of carbonaceous asteroid Ryugu: Direct evidence from returned samples (2023)
  • Author(s): Nakamura T., Matsumoto M., Amano K., Enokido Y., Zolensky M. E., Mikouchi T., Genda H., Tanaka S., Yabuta H. et al.
  • Journal Title: Science Volume: 379 Pages: -
  • DOI: 10.1126/science.abn8671
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Samples returned from the asteroid Ryugu are similar to Ivuna-type carbonaceous meteorites (2023)
  • Author(s): Yokoyama T., Tachibana S., Yurimoto H., Yabuta H. et al.
  • Journal Title: Science Volume: 379 Pages: -
  • DOI: 10.1126/science.abn7850
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] A dehydrated space-weathered skin cloaking the hydrated interior of Ryugu (2022)
  • Author(s): Noguchi T., Matsumoto T., Miyake A., Igami Y., Haruta M., Saito H., Hata S., Seto Y., Miyahara M., Tomioka N., Ishii H., Yabuta H. et al.
  • Journal Title: Nature Astronomy Volume: 7 Pages: -
  • DOI: 10.1038/s41550-022-01841-6
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Oxygen isotopes of anhydrous primary minerals show kinship between asteroid Ryugu and comet 81P/Wild2 (2022)
  • Author(s): Kawasaki N., Nagashima K., Sakamoto N., Matsumoto T., Bajo K., Wada S., Igami Y., Miyake A., Noguchi T., Yamamoto D., Russell S. S., Yabuta H. et al.
  • Journal Title: Science Advances Volume: 8 Pages: -
  • DOI: 10.1126/sciadv.ade2067
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Contribution of Ryugu-like material to Earth’s volatile inventory by Cu and Zn isotopic analysis (2022)
  • Author(s): Paquet M., Moynier F., T. Yokoyama, W. Dai, Y. Hu, Y., Yabuta H. et al.
  • Journal Title: Nature Astronomy Volume: 7 Pages: 182～189
  • DOI: 10.1038/s41550-022-01846-1
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Trace-element analysis of mineral grains in Ryugu rock fragment sections by synchrotron-based confocal X-ray fluorescence (2022)
  • Author(s): Bazi B., Tack P., Lindner M., Vekemans B., De Pauw E., Tkalcec B., Brenker F. E., Garrevoet J., Falkenberg G., Yabuta H., Yurimoto H., Nakamura T. et al.
  • Journal Title: Earth, Planets and Space Volume: 74 Pages: -
  • DOI: 10.1186/s40623-022-01726-y
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Rock Magnetic Characterization of Returned Samples From Asteroid (162173) Ryugu: Implications for Paleomagnetic Interpretation and Paleointensity Estimation (2022)
  • Author(s): Sato M., Kimura Y., Tanaka S., Hatakeyama T., Sugita S., Nakamura T., Tachibana S., Yurimoto H., Noguchi T., Okazaki R., Yabuta H. et al.
  • Journal Title: Journal of Geophysical Research: Planets Volume: 127 Pages: -
  • DOI: 10.1029/2022JE007405
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] First asteroid gas sample delivered by the Hayabusa2 mission: A treasure box from Ryugu (2022)
  • Author(s): Okazaki R., Miura Y. N., Takano Y., Sawada H., Sakamoto K., Yada T., Yamada K., Yabuta H. et al.
  • Journal Title: Science Advances Volume: 8 Pages: -
  • DOI: 10.1126/sciadv.abo7239
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Ryugu’s nucleosynthetic heritage from the outskirts of the Solar System (2022)
  • Author(s): Hopp T., Dauphas N., Yabuta H. et al.
  • Journal Title: Science Advances Volume: 8 Pages: -
  • DOI: 10.1126/sciadv.add8141
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The Solar System calcium isotopic composition inferred from Ryugu samples (2022)
  • Author(s): Moynier F., Dai W., Yokoyama T., Hu Y., Paquet M., Yabuta H. et al.
  • Journal Title: Geochemical Perspectives Letters Volume: 24 Pages: 1～6
  • DOI: 10.7185/geochemlet.2238
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Rare earth element identification and quantification in millimetre-sized Ryugu rock fragments from the Hayabusa2 space mission (2022)
  • Author(s): Tack P., De Pauw E., Tkalec B., Lindner M., Bazi B., Vekemans B., Brenker F., Di Michiel M., Uesugi M., Yurimoto H., Nakamura T., Yabuta H. et al.
  • Journal Title: Earth, Planets and Space Volume: 74 Pages: -
  • DOI: 10.1186/s40623-022-01705-3
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Presolar Stardust in Asteroid Ryugu (2022)
  • Author(s): Barosch J., Nittler L., Wang J, Yabuta H. et al.
  • Journal Title: The Astrophysical Journal Letters Volume: 935 Pages: L3～L3
  • DOI: 10.3847/2041-8213/ac83bd
  • Peer Reviewed / Int'l Joint Research
• [Presentation] Initial Analysis of Macromolecular Organic Matter in the C-type Asteroid Ryugu Samples Returned by Hayabusa2 (2022)
  • Author(s): Yabuta H. et al.
  • Organizer: Astrobiology Science Conference (AbScicon 2022)
  • Int'l Joint Research / Invited
• [Presentation] Initial Analysis of Macromolecular Organic Matter in the Asteroid Ryugu samples: Overview (2022)
  • Author(s): Yabuta H. et al.
  • Organizer: Goldschmidt Conference 2022
  • Int'l Joint Research
• [Presentation] Hayabusa2 initial analyses of organic matter in the asteroid Ryugu samples (2022)
  • Author(s): Yabuta H. et al.
  • Organizer: COSPAR 2022
  • Int'l Joint Research / Invited
• [Presentation] Potentiality of small body explorations to develop planetary science to frontier material science (2022)
  • Author(s): Yabuta H. et al.
  • Organizer: COSPAR 2022
  • Int'l Joint Research
• [Presentation] An updated overview of macromolecular organic matter in the C-type asteroid Ryugu samples (2022)
  • Author(s): Yabuta H. et al.
  • Organizer: The 85th Annual Meeting of The Meteoritical Society (MetSoc 2022)
  • Int'l Joint Research
• [Presentation] Hayabusa2 Initial Analysis of Macromolecular Organic Matter in the Asteroid Ryugu Samples (2022)
  • Author(s): Yabuta H. et al.
  • Organizer: Japan Geoscience Union 2022 (JpGU 2022)